All-terrain vehicle



FIG. 1 is a perspective view of an all-terrain vehicle, showing my design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is top view thereof; and,

FIG. 7 is a bottom view thereof. 

The ornamental design for an all-terrain vehicle, as shown. 